Improved bolt-headiwg machine



3 Sheets-Sheet 1. 'P. B. PRINDLE. BOLT HEADING MACHINE. N0. 98,798.

Patented Jan. 11,- 1870.

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P. B. PRINDLE. BOLT READING MACHINE.

No. 98,798. Patented Jan. 11, 1870..

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Letters Patent N 98,798, dated January 11, 1870.

IMPROVED BOLT HBADING MACHINE.

- Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.-

Be it known that I, FRANKLIN B. Pnmnms, of Southington, in the county of Hartford, and inthe State of Connecticut, have invented certain new and useful Improvements in Bolt-Heading Machine; and

do hereby declare that the following is a full; clear, and exact description thereof, reference being bad to the accompanying drawing, making a part of this specification, in which- Figure 1 is a plan view of the upper side of my improved device.

Figure 2 is abrokeu section of the same, with some of the attachments to the side-swagcs and holdingdies removed. r

Figures 3 and 4 are side elevations of the carriers for a side-sn'age and holding-die, respectively.

Figure 5 is a plan view of a connecting bar for communicating a positive mot-ion tothe side-swages.

Figures 6 and 7 are a; front and side elevation, respcct-ively, of the end-die and plunger.

Figure 8 is a cross-section of the same, on the line a: z, of figs. 6 and 7' Figures 9 and 10 are front elevations of a sideswage and a holding-die, respectively.

Figure 11 is a plan view of an elbow-connection.

Figure 12 is a side elevation of the machine, with the driving-pulley removed.

Figure 13 is a side elevation of the driving-pulley, clutch, and paw].

Figure 14 is a cross-section of the same, on the line Figure 15 is a .i'ront elevation of the devices for operating the clutch and arresting the motion of the shaft.

Figure 16 is a vertical longitudinal section of the same, on the line 2 z of fig. 15.

Figure 17 is a rear elevation, and

Figure 18, a plan view of the same.

Figure 19. is a cross-section of the detent and guide for arresting the motion of theshaft.

Figure 20 is a broken sideelevation of the frame, showing the cam and arm for releasing the holdingdies, and

Figures 21, 22, and 23, are vertical cross-scctions of the shaft, on' the lines 9:, y, and 2, respectively.

Letters of like name and kind refer to like parts in each of the figures. I

My invention belongs to a class of devices used for heading bolts; and i In consists, principally, in the peculiar arrangement and operation of the side-swages and end-dies, and of the plunger, by means of which the ironis first upset, so as tofill the end-dies vertically, and form two sides of the head, which is aflzerward completed by the action of the side-swages, as is hereinafter 'set forth.

It further consists in the construction of the carri ers for the holding-dies and side-swag'es, and in the means employed for securing said dies and swages therein.

It further consists in the construction of the carrier for the end-dies, and in the means employed for securing and'adjusting said dies.

It further consists in the means employed for cominunicating apositivemotion from the cam-bars to the carrier of the side-swages and holding-die, and, iuconnection therewithfln' the means employed for withdrawing said carriers.

It further consists in the means employed for'couvcrting a rotary motion of the shaft into an intermittent reciprocating motion of the swages, plunger, and holding-die, as is hereinafter specified.

I t further consists in the construction and operation of the devices employed for 1'ei'easing"the drivingwheel from engagement with the shaft, and for arresting the motion of the latter, as is hereinafter set forth.

It finally consists in the construction and arrange-, ment of the various parts of the machine, substantially as shown, and for the purpose specified.

In the annexed drawing A represents the bed-plate, constructed of castmetal, and supported by four legs, B.

Journaled within suitable boxes, D, near the rear end of the bcd-platc, is a shaft, E, extending trans? verseiy across the same, having secured upon, at l rcvolving with it, a number of cams, by means of which the various parts of the machine are operated.

Extending transversely across the upper surface of the bed-piece A, nearitsfront end, is a groove or channel, in which the carriers for the side-swages and holding-dies are contained, while three other grooves, extending rearward from, and at a right angle with the former, contain the connecting-bars for operating said dies and swages.

Asseen'in fig. 4,'the holding-dies F are held between a. touch or lip, g, projecting forward from the carrier G, and an angular and of a clamp, H, the op-. posite end of which rests upon said carrier, the whole being firmly secured together by means of a bolt, h, attach ed to said carrier, and extending upward through said clamp, where its upper end is provided with a slot and key, or with a screw-thread and nut.

y The left-hand holding-die is secured in position by means of a clamp, 1, extending across its carrier, in

which a corresponding groove is provided, the ends of said clamp being let'lnto the bed-plate, while the cp posits die is alternately moved to and from the other by means of a bar, K, operated by a cam upon the shafhand connected with said carrier in the manner hereinafter described.

As seen in he. 4, the carrier G has a recess, 9', ex-

tending transversely across the same, from its upper side nearly to its bottom,- the front end of which has the .form of a half-round pin, g".

A short bar, L, corresponding in thickness to the depth of the recess, is provided with concave ends,

from the slight motion of the joint-bar L upon the pins 9 and k, but little friction is created.

In. order that the carrier may bewit-hdrawn whenthe bar K is drawn backward, a clamp, M, is placed across'the recess in the former, and secured thereto by means (if dowel-pins, m, extending upward from said carrier, and passing through suitable openings in said clamp.

A pin, m, passes downward through the clamp M,

outside of, and in contact with the edge of the bar K, which, at that point, curves outward and forward at a suitable angle, so that as said bar is drawn backward, said pin, and consequently the carrier G, are drawn out-ward.

- The side-swages N consist of suitable blocks of steel, fitting into a dovetailed groove in the face of the block 11, so as to be adjustable longitudinally withinthe same. I

A pin, n, having one end just above the upper side of the block it, and its lower end resting upon the upper side of. the swage, is made to hold the latter in place, and firmly secure the whole to its carrier 0 by means of an angular clamp, 0, one end of which rests upon said pin, u'ywhile the other rests upon said carrier,

' said clamp being held in place by means of a key passing through the upper projection of said carrier 0.

The carrier 0 is constructed and operated in the same manner as isthe carrier .G, being connected with a cam-bar, P, by means of a short elbow-conned tion, 12, so as to receive the forward or positive motion, and having a pin, 1', projecting downward from a clamp,

' R,'into a curved slot, 1), within said bar 1, by which means said carrier is moved backward.

It will be readily seen that directpressure upon the side-swages or holding-die will cause an outward pressure of the carriers and cam-levers, and create a certain amount of friction between the same and their contiguous bearing-surfaces, which friction is reduced,

and all unnecessary wear avoided, by the application of steel plates upon said bearing-surims. In figs. 6, 7, and 8, are shown the end-dies S, secured vertically within a groove in the face of the carrier T, and rendered adj ustable to or from the centre by means of asst-screw, t, passingjnward through a projection upon either end of the carrier.

Two straps, U, passing around bothdies'and carhold said dies firmly in place, when adjusted.

Secured to and projecting rearward from opposite sides of the carrier T, are two lugs, V,--whioh just fill the space horizontally between two cam-bars, W, and

vertically between two clamps,.w, secured to andcon 'necting the upper and lower sides of said bars, the upper clamp w being removable, and secured in place by means of slotted bolts and keys, or any other equivalent device.

Working in the space between the cam-bars W, is another bar or carrier, X, to which is attached the plunger Y, in the manner hereinafter shown. The rear end ofthe plunger Y passes into .a corresponding opening in one end of the block Z, and is secured therein by urea-us of a set-screw, y, while, in

turn, said blockZ is fitted into a corresponding recess within the trout end of the carrier X, and secured rrer, and provided at their rear ends with a key, u,

-' espretherein by means of a clamp, A, which, passing over a round dowel-pin, y, projecting upward from the rear end of said block, and an oblong dowel-pin, a,-

projecting upward from the carrier, is firmly locked down upon the upper side of said block and carrier, by a key, passing through an opening in the upper end of said pin a.

A set-screw, a", passing through the rear end of the clamp A, bears against the pin a, and as the slot in said clamp, through which said pin passes, is lengtherred sdmewhat, the block Z is drawn firmly against the rear end of the recess in the carrier.

By this method of connecting the plunger to the carrier, the former can be readily removed when dc,- sired, without interfering with or removing the latter.

As before stated, the means employed foractuating the swages, plunger, and holding-dies, consists of a series of cams, secured upon the shaft E, and operating upon the cam-bars through suitable angular arms, pivoted upon three shafts, B', resting' in boxes attached to the lower side of the bed-plate; but in order to better illustrate the same, the operation of each portion will be described.

In case of the holding-dies, it being necessary that they should be closed, and retained in such position during the entire process of heading the bolt, the actuating-cam 0, having about three-fifths of an entire circle, is caused to press against and throw forwa-rd the upper end of an arm, D, secured upon and projecting upward from the shaft B, and thus produce a corresponding motion of the cam-bar K, which is connected with said arm D, by means of a short connection, E, pivoted at either end to one of said.

' the parts being such as to cause said cam G to press downward the arm F, and,- by partially rotating the shaft B, withdraw the cam-bar K at the instant that the cam O releases the arm I).

As the side-swages require to becloseu and instantly opened again, the cam H. is somewhat short, while the arm 1, with which it engages, is angular, and is pivoted loosely upon the shaft- B.

When in operation, the arm 1 (remaining stationary during about three-fifths of each revolution of the shaft E) is thrown forward, by the. action of the cam H, upon its vertical portion, and immediately thereafter is returned to position by the striking of said cam upon the horizontal portion thereof.

The end-dies, unlike those just described, are moved forward and remain in position during about one-third of a revolution of the shaft E, after which they are withdrawn.

To accomplish this result, two arms, K and L, pivoted near their centre, lengthwise, and connected together, at their lower ends, by a short bar, M, are thrown back and forth by a cam, N, and, by means of a connection, 0, pivoted to the rear end of the cam-bar W, and to the upper end of the arm K', prognce a corresponding motion of said bar and the endres.

The motion or the plunger is similar to that of the side swages, but, from its position in the machine, the result is produced in a different manner.

A short cam, P, is caused to throw forward the vertical portion of an angular arm, R piroted upon the shaft 13, and connected with the carrier X, by means of a shortconnection, 8', while the return-mi tion is produced by the action of the cam N, striking against the upper end of two bars, T, which, being connected together at their lower ends, pass upward within suitable grooves, upon opposite sides of the against the plunger, in which position itis firmly seized by said dies.

' The end-dies now move forward against the inner vertical ace of the holding-dies, and are immediately followed by the plunger, which, passing between said dies, upsets the end'of the blank, and causes it to fill the space vertically between the same, after which said plunger is quickly withdrawn.

Upon the removal of the plunger, the .side-swa'ges are moved toward the. centre, and passing between the end-dies, form the sides of the head, when they arewithdrawn, and the holding-dies opened, so as to release the bolt, which is then turned one-fourth of a Y revolution, and submitted a second time to the before described operation, by which means-ahead is formed having a perfect shape, and vwith all of its corners sharp and exact.

It will be observed, that by upsetting the blank between the end-dies', before the side sWages are moved forward, the iron, after filling the space vertically between the said'dies, is permitted to expand laterally, by which means the necessary enlargement is secured for forming the under sideof the head, which result would not be obtained if both side-swages and end- 'dies were moved into place simultaneously, and the plunger depended-upon to fiilthe space between the same, as, iii the latter event, the outer 'end of said space would be filled at once, and prevent the spreadlug-of the iron within.

By the employment of suitable swages, any form of head desired may be produced with equal facility and exactness.

. Secured upon and revolving with one end of the shaft E, is a circular disk, U having within its outer face a radial groove, in which is placed a correspondlng bolt or detent, V.

Projecting horizontally inward, through a suitable opening in the disk, is an arm, a, forming a part of the detent V, which rests upona spring, v", andis thereby passed outward, together with said detent, so as to cause the outer end of .the latter to engage, with one of a series of corresponding recesses, 19', within the face of a bandwheel, W, that is fitted loosely upon the end of the shaft E, and over the periphery-of the'disk, by which means said wheel and disk are locked together, and motion given to the former is communicated, through the latter, to the shaft.

In order to release the detent'from engagement with the wheel, and thus arrest the motion of the shaft, when desired, the hereinafter-described devices are employed.

A short shaft, X, journaled within suitable bearings ac, on a line with the inner face of the disk U, and somewhat above and inrear of the shaft E, is provided, at its forward end, with an arm, Y, which, pro ject-ing inward in nearly a horizontal line, has a radial movement, with said shaft for an axis.

A second arm, Z, is attached to and extends downward from the rear end of said shaft, and, when caused saves means whereby the arm Z may be operated so as to bear against 'the disk U, and, pressing inward the dctent, release the shaft from engagement with the wheel, or, by being turned away from said disk, allow' said detent to pass unmolcsted. y

, It being desirable that the motion of the machine should always be arrested at one point, orvwil hihc holding-dies open, a tooth, O", is secured to and je'cts radiallyii'om the hub of the disl'rU gage with a detent, D", projecting forwa frameE", which supports the releasing-dev ces, here: inbeforc described. a

The detent D is fitted, into a dovetailed groove within a block, F, and has a longitudinal motion therein, while said block F" is pivoted, at its front end, and rests, at its rear end, upon a stud or pin, G, which, passing downward, is supported by a spring, g.

Pivoted to the upper side of the detent D", is one end of a short link, d", the opposite end of which is pivoted to the vertical arm H" of a rocker-shaft, which has, upon its opposite end, a second arm, 1", projecting rearward, where it is pivoted to or upon the rear end of the lever A, so that when said lever is depressed at its forward end, said detent D" is withdrawn from engagement with the tooth G, and when the forward end of said lever is raised, said detent is thrust forward so as to engage with said tooth, and arrest the motion of the shaft.

It will be observed, that when the forward end of the lever is depressed, it not only withdraws the detent D, but also removes the arm Z from contact with the detent V, so that while the band-wheel and shaft are locked together, no obstruction is offered to the motion of the latter; but if said lever be raised, so as to cause said arm Z to release said detent N" from engagement with the wheel, the same'movcment thrusts forward the detent D, and arrests the motion of said tooth G, and of the shaft.

A spiral or other spring, K, placed beneath the forward end of the lever A", holds the latter in such a position as to suspend the operation of the machine, except when said lever is depressed by a slight pressure of the hand.

When in operation, the shaft B would acquire considerable velocity, and, 'by its momentum, when released from engagement with the driving-wheel, would cause a considerable shock when the tooth 0 was arrested by the detent D", unless the latter was, in some manner, rendered elastic.

This result is produced by means of tlie pivoted block F, the pin G, and the spring 9, and so well do they perform their ofiice that in stopping the ma-' chine no perceptible jar is experienced.

Having thus fully set forth the nature and merits of my invention,

What I claim asnew, and desire to secure by Letters Patent, is-- 1. The combination of the holding-dies F, the enddies S, the plunger Y, and the side-swages N, constructed, arranged, and operating in the order, as to time, substantially-as described, and for the purpose specified 2. Also, the carriers Gand 0, constructed as described, in combination with the clamps H and c, and their binding-keys, substantially as shown and described. 3. Also, the carrier X, constructed as described, and provided with the clamp A, in combination with the block Z and plunger Y, substantially as herein shown," and for the purpose specified.

4. Also, the means employed'for securing in place the side-swages, consisting of the grooved'block u and pin it, in combination with the-carrier O and clamp. 0, substantially as herein specified.

. 5. Also, the means employed for securing in place and rendering relativey adiustable the end-dies S,

consisting of the carrier T, provided with the set-screws t, and the straps U, provided with the key M, substan tially as shown, and for the purpose set forth.

" 6. Also, the means employed for imparting to the movable holding-die and side-swages a positive for- .edge It, and slot 1), in combination with the carriers G and O, and the cam-bars P and K, suhstautially as shown and described.

7 Also, the means employed for operating the holding-dies, end-dies, plunger, and side-swages, in the order required, consisting of the cams G, G, H, N, and P, secured to and revolving with the shaft E, and the pivoted arms I), F, I, K, L, and R, suitably connected to the cam-bars, all constructed and arranged to operate substantially as and for the purpose specified.

8. Also, the means employed for arresting the motion of the shaft E, when not in gear with the pulley W, consisting of the tooth G", the detent the pivand arranged substantially as described, and for the purpose of throwing said pulley W in and out of gear with the shatt E I 10; Also, the construction and arrangement of the various parts of the hereinhefore-described bolt-heading machine, substantially as shown, and for the purpose set forth.

In' testimony that I claim the foregoing, I have hereunto set my hand, this 12th day of November,

FRANKLIN B. PRINDLE. Witnesses:

GEO. 8. Parsons," Emu. F. BROWN. 

